Sounds like you used the wrong method. You should have done this:
- Download the K5 JailBreak (5.0.x - 5.4.4.2) package from the snapshots thread.
- Find the kindle-5.4-jailbreak.zip file and unzip the contents to your Kindle's root directory.
- Select the Update Your Kindle option in the settings menu and wait until the words **** JAILBREAK **** appear at the bottom of your screen.
- Select the Restart option in the settings menu, and wait for your Kindle to restart.